Calculate Greenwich Mean Siderial Time at 0h, UT1 (GMST1) from UT1 year, month, and day.
gmst1(yr = 2012, mo = 1, dy = 1)
UT1 year (integer)
UT1 month (integer)
UT1 day (integer)
Function calculates Greenwich Mean Siderial Time at 0h, UT1 (GMST1) given UT1 year, month, and day.
Returns fractional hours of GMST1 with class fracHrs. The
corresponding print method gives hh:mm:ss format rounded to
places in seconds by setting
Multiply UT1 fractional day by 1.002737909350795 to get fractional sidereal day.
Explanatory Supplement to the Astronomical Almanac Seidelmann (ed), c. 1992
1 2 3
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.